[1] Niigata Univ, Med & Dent Hosp, Biosci Med Res Ctr, Niigata 9518520, Japan
[2] Niigata Univ, Grad Sch Med & Dent Sci, Div Resp Med, Niigata 9518520, Japan
[3] NHO, Kinki Chuo Chest Med Ctr, Osaka, Japan
[4] Chiba Univ, Grad Sch Med, Dept Respirol, Chiba, Japan
[5] Natl Ctr Global Hlth & Med, Div Resp Med, Tokyo, Japan
[6] Kyorin Univ, Sch Med, Dept Resp Med, Tokyo, Japan
[7] NHO, Yamaguchi Ube Med Ctr, Ube, Yamaguchi, Japan
[8] Kurashiki Municipal Hosp, Kurashiki, Okayama, Japan
[9] Kitasato Univ, Sch Med, Dept Resp Med, Kanagawa, Japan
[10] Nagasaki Univ, Inst Trop Med, Nagasaki 852, Japan
[11] Hokkaido Univ, Sch Med, Dept Med 1, Sapporo, Hokkaido 060, Japan
[12] Tohoku Univ, Sch Med, Dept Resp Med, Sendai, Miyagi 980, Japan
[13] Aichi Med Univ, Sch Med, Div Resp Med & Allergol, Dept Med, Aichi, Japan
[14] Cincinnati Childrens Hosp Med Ctr, Dept Pulm Biol, Cincinnati, OH USA